Fair Greening of Broadband Access: Spectrum Management for Energy-Efficient DSL Networks

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Executive Summary

Dynamic Spectrum Management (DSM) is recognized as a promising technology to reduce power consumption in DSL access networks. However, the correct formulation of power-aware DSM problem statements requires a proper understanding of greening, i.e., reducing power consumption. In this paper, the authors therefore investigate greening and show that it can be decomposed into two dimensions: the price of greening, and the fairness of greening. They first analyze the price of greening, providing theoretical bounds on the power-rate trade-off, and identifying the typical trends that can be expected in practice, with some particularly promising results. Then, they introduce the fairness dimension, where they show that fairness becomes crucial when reducing power consumption.

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